Question 3
Exercise 19. In the figure below, find the value of $x$.
**Editorial input convention:** For this exercise, assume the outer left side is perpendicular to the bottom base. Let x be the obtuse angle indicated by the unlabelled arc at the crossing. Enter degrees. These clarifications are editorial; the original figure lacks both the right-angle mark and the x label.
**Editorial input convention:** For this exercise, assume the outer left side is perpendicular to the bottom base. Let x be the obtuse angle indicated by the unlabelled arc at the crossing. Enter degrees. These clarifications are editorial; the original figure lacks both the right-angle mark and the x label.